The Phil Trans B issue on ‘The global nitrogen cycle in the 21st century’ has been published

The Phil Trans B issue on ‘The global nitrogen cycle in the 21st century’ has been published online. Discussion Meeting Issue 'The global nitrogen cycle in the twenty-first century' organised and edited by David Fowler, John A. Pyle, John A. Raven and Mark A. Sutton, July 5, 2013; 368 (1621).